Surf smelt are a schooling fish found in shallow nearshore waters along Puget Sound. Adult surf smelt feed on plankton and in turn become food for seabirds, marine mammals, and a variety of fishes including salmon.

Surf smelt spawning beach, upper intertidal zone, Vashon Island.

Spawning On The Beach

Surf smelt spawn in the upper intertidal zones of mixed sand and gravel beaches, generally within a few feet of the high tide line. Spawning takes place year round on beaches along Whidbey Island, Camano Island, Semiahmoo Bay, Cherry Point, Fidalgo Bay, Sinclair Inlet, the San Juan Islands, and the outer coast of the Olympic peninsula.
Fall and winter spawning occurs along Liberty Bay, Port Orchard, Quartermaster Harbor, southern Hood Canal, and southern Puget Sound. Summer spawning occurs along the Strait of Juan de Fuca.

Surf Smelt Spawning Beaches

Over 200 miles of surf smelt spawning beaches are known to exist along Puget Sound.

Surf smelt spawning beaches are often located at the heads of bays or inlets shaded by trees and bluffs. Shade moderates beach surface temperatures and helps summer-spawned eggs survive to hatching.

Many sand and gravel beaches have yet to be surveyed for evidence of surf smelt spawning activity.

Surf smelt spawning beaches known in Puget Sound.

Eggs are Laid
at High Tide

Ripening surf smelt move in close to the water's edge at high tide for spawn deposition. Adhesive eggs about 1 millimeter in diameter are laid on the surface of the beach. Subsequent wave action covers the eggs with beach sediments.

Surf smelt spawn on beach.

Juvenile Surf Smelt
Use Nearshore Waters

Larval surf smelt enter the nearshore plankton after hatching. Juvenile surf smelt linger and feed in shallow waters throughout Puget Sound. The majority of spawning surf smelt are two years of age, with some males maturing at one year of age.

Surf smelt eggs.

Although surf smelt do not die after spawning, very few survive to be three or four years old. Surf smelt show great annual predictability in spawning sites and seasons, but the degree to which they "home" back to their beaches of their birth is unknown.

Even on lightly armored beaches, wave action along the base of the structures may scour away fine-grained sediments. Armoring on long stretches of shoreline and conversion of natural streams to drainage culverts may remove sources of beach sediments to long shore drift systems. Beaches may gradually coarsen, eliminating essential surf smelt spawning substrate.

The upper intertidal zones of beaches are important habitat for surf smelt and other species. All known surf smelt spawning sites have been given enhanced "no net loss" protection in the application of Washington Administrative Code (WAC) "Hydraulic Code Rules."